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Stable graphene oxide-gold nanoparticle platforms for biosensing applications.
Dania Hernández-Sánchez1, Giovanny Villabona-Leal, Izcoatl Saucedo-Orozco
1Instituto de Física, Universidad Autónoma de San Luis Potosí, Manuel Nava 6, Zona Universitaria, San Luis Potosí SLP 78290, Mexico. mildred@ifisica.uaslp.mx.
Physical Chemistry Chemical Physics : PCCP
|December 22, 2017
Summary
This study presents stable graphene oxide-gold nanoparticle hybrids synthesized using UV light. These hybrids demonstrate excellent stability and signal enhancement, showing potential for sensitive biosensing applications in disease diagnosis.
Area of Science:
- Nanomaterials Science
- Biochemistry
- Spectroscopy
Background:
- Graphene oxide (GO) is a versatile nanomaterial.
- Gold nanoparticles (AuNPs) have unique optical and electronic properties.
- Developing stable and functional hybrid nanomaterials is crucial for advanced applications.
Purpose of the Study:
- To fabricate graphene oxide-gold nanoparticle (AuNPs@GO) hybrids without stabilizing agents.
- To investigate the synthesis mechanisms and stability of AuNPs@GO hybrids.
- To evaluate the potential of AuNPs@GO for biosensing applications using Surface-Enhanced Raman Spectroscopy (SERS).
Main Methods:
- Synthesis of AuNPs@GO hybrids via UV-light irradiation in aqueous dispersion.
- Characterization using UV-Vis, Raman, IR, X-Ray photo-spectroscopy, TEM, TGA, and electrochemical tests.
- Fabrication of AuNPs@GO biosensing platforms for SERS detection of crystal violet (CV) and flavin adenine dinucleotide (FAD).
Main Results:
- AuNPs@GO hybrids were successfully synthesized free of stabilizing agents.
- The hybrids exhibited outstanding chemical, thermal, and electrochemical stability.
- SERS detection of CV and FAD showed high signal intensification, confirming the platform's sensitivity.
Conclusions:
- UV-light irradiation is an effective method for fabricating stable AuNPs@GO hybrids.
- The AuNPs@GO hybrids demonstrate exceptional stability and SERS signal enhancement.
- These hybrids hold significant potential as biomedical probes for disease detection and monitoring.
